THE GEOLOGIC AGE,STRATIGRAPHIC SUBDIVISION AND CORRELATION OF THE“HIGH RESISTIVITY RED BED” IN THE DONGPU DEPRESSION,BOHAI SEA COASTAL BASIN
ZHAO Wei~ 1)2) , JIANG Fei-hu~ 2) , and TANG Shu-yan~ 2) 1) Graduate School of Southwest Petroleum Institute, Chengdu, 610500; 2) Research Institute of Exploration and Development, Zhongyuan Oilfield, Puyang, 457001
The geological age, stratigraphic subdivision and correlation of the “High Resistivity Red Bed” in the Dongpu Depression,Bohai Sea Coastal Basin, has been an unresolved question. Based on regional stratigraphic correlation, K-Ar dating of clay minerals, and micropalaeontological data, the present paper proposes that the “High Resistivity Red Bed” is Early Triassic in age. It can be correlated with the Lower Triassic Liujiagou Formation and the Heshanggou Formation, which are widespread in the central-western North China Platform.